Method of multiple transmission



Feb. 17, 1931. R. HOOVER ET Ax. 1,793,319

METHOD OF MULTIPLE TRANSMISSION Filed April 29, 1950 s Sheets-Sheet 1 AC. D V-AMI! [Pl K75 PINE- 4 Rft'i/V/hi RING:

J'am fa Fla /6 fl JINP/NG RINGS CI'IAMVFL B CHANNEL 6 gwuvmtow 56 afo m;

'Feb. 17, 1931. R. HOOVER ET AL 1,793,319

I METHOD OF MULTIPLE TRANSMISSION Filed April 29 1950 3 Sheets-Sheet 2 "A" c ANNiL PRINT R IIIIILI IIH IILI I I I I 1 gin 04214 6013;

PA Y HOOVER 1705577 E 0/55 57 Feb. 17, 1931. R. HOOVER ET AL METHOD OF MULTIPLE TRANSMISSION 3 Sheet-Sheet 5 Filed April 29, 1930 &

my HOOVER ROBERT E D/l-FKES dl tomwq Patented 17, 7193 1;

STATES RAY .VHOQVER, or NORTH ,rLArurInL J, j RsE iiipv aomm pInKns, or

JAMAICA, NEW onnnssreuons To rnniwnszrnmvnu on,rELEeRArH ooMrAnY, or unwxonx, at y;, a conroaarronornnw 103x911 V 1 x v meson or? a rman- TRANSMISSION vii' ncano'n r file d earn 29;

' This invention relates to a multiplex printing" telegraph system and more particularly to atransmission system fora mnnber of outgoing lines in which identical information is to be transmitted over eachof the lines through one or more of the multiplex channels, and non-identical information is to be transmitted over the various lines through the remaining channels It is often desirable in multiplex telegraphy,-in distributing to a largenumber'oi points, cerlain types of general information, such as'press reports, stocks, bonds, commodity quotations,'etc., to utilize'on'e or more channels of each'of a number of line circuits for the transmission of such iniormation in identical form, and to utilize the remaining channels of each line for local or individual messages. This general -iniormation may be'distributed irregularly among the various channels of a group of line circuits. F or instance, in' four channel multiplex systems involving five line circuits,' it

may be desired to supply stockquotations to all five lines over the first channel,'bond quotations to lines one, two, and three, over the second channel, and press reports to lines two and four, over channel three. The unalloied channels may be utilized for local or individual mes-sages. i i a ,Hereto'fore in such cases a separate multi- I ple distributor has been provided for each line or group of lines over which the same information is to be transmit-ted and aseparate transmitter, such as a-tape transmit ter, has been used with eachj'clistributor for each "channel. This has also necessitated the preparation'ofa separatetape-ior each transmitter employed for transmitting the common or; general' information to the different lines. i

One of the objects of the presentinvention is to provide a multiplex telegraph system for transmitting identical information over a number of lines through one or-Inore multiplex channels in which therewill be a saving ofcquipmentand a'reduction in the number of operatorsrequired.

Another ob ect s to provide a multiplex system in which a singlemultiplex distribuvthegeneral pairs 1 of 1 sending.w rings, ;a pair:

1930; stamina." 443,370; j

tor-will suifice for the control of a number of linesa'nd in which. one channel transmitter only'is required for the transmission of information to each of the lines.

-Another object is to provide, in a multiplexsystem" involving a number oilines, or groups of lines, over which different signals are transmitted through at least one channel, means for transmitting the same signals to two or more of the lines through another channel, from a singleftransmittingapparatus. i-' 1 I i Other objects and advanl'agesnof the invention will appear from the following description. I v Reierence'will'now be had to the accompanying drawings fora complete explanation of the invention wherein: a 1 Figures 1A and 1B taken together-illustrate diagrammaticallya transmitting sysinterruptingthe transmission of other signals over theremaining lines;

Figure 2 is a'diagrammatic view'oi a modi fied arrangement for obtaining an outgoing printed record of the. transmitted vsignals. Y

' Referring first to FigureslA multiplex distributor; is shown,- having two rings, a pair of local and phasing rings, and

a pair of AC-balancing'rings, as indicated by and 1B, a

v for transmitting of receiving The-sending ringszeach' comprise a solid ring 'lO an-d 10 respectively,and a segmented ring 11 and 11 respectively. Rings 10 and '11 are traversed bya brush b1 and rings 10" and 11" by a brush 62. I The segmented rings each have twelve segments toprovide facilities for two channel multiplex, operation. Segmentsl to 6'- ofea-ch'of theringsll and 11- are connected by groups of conductors I contacts solid pin 1): (see jack 22 12 and12 respectively to the contact tongues 13 of a tape transmitter 14 operating into channel A of the multiplex system, segments.

B, and segments 7 to 12 of ring 111 are cpn "nected by a group ot conductor's15 to the tongues are tape transmitter .16 operating The tape -f transmitter "14 the segments ot each into channel- B. thus serves to set-up on oi the sending rings, identical signal combinations and the transmitters 16"and16' serve to set-up ditl'erent signalcombinationson rings 11 and 11, for the second channel. 7'

Rings .10 ,and .11:serve. to transmit. toLa duplexlineL and rings 10 and 11 transmit to a duplex lineL. Solid ring, 10, forthis purpose, is connected by, a, conductor 17 -.to oneend of the winding of ajpolarized relay 18, the oppositeend otwthe winding, being groundedatlS); The i'narksing: and spacing M and-S, of, the relay 18, are con nected. to. negative and positive batteryrespectively, the tongue T being. joinedby a conductor 20tojcontact spring bot a pinjack 22. The apex of the duplex line L is connected bya conductor23 to spring. d of jack When it is desired to transmit from distributor'rings 10, and 11 overthe line L, a is inserted in the jack 22 to depress the springbinto contact with. springcl and thus connect the-tongue of the relaiylS-to. the duplex line. The marking and spacing signal combinations setup onthe segments'ot the ring-ll'are thus re,- peated by the relay 18"di'rectly. tothe line; Similarly, the signal, combinationsset .u- ,on the ring v11 are repeated tothe lineL by polarized relay.18,-the tongue of which has corresponding connections through the jack 22 with the duplex lineL. 1

The receiving rings provide for-the production of an outgoing printed record of the signals transmitted through rings; 10 and 11, and comprise a solidring 23.;and, a segmented llnOT, Rik-The solid ring is connected-by a con ductor 25 to the tongue of'a-polarizedjrelay 26, the contacts a andibotwhihh are connected respectively to .a source of positive :potentialand to the. ground, Oneterminal. of the winding: of: the relay 26 r is, connected, to: the

'- sending ring 10,- the opposite; terminal being grounded, whereby therelay'tongu'e is caused to engage either: one .or'the'other of its contacts in. responseto marking or spacing s1g nals,;and thereby tolrepeat:themarking and Y spacing signals either as a positive battery or ground potential- The segmented'receiving I1Ilg'24'1S provided with thirtysix .segme'nts, every third toithe" -solid receiving ring segment, beginningwith thefsecond, being net windings being connected to 24% adapted to betraversed by, a brush ing, in' the numbered as 1 to 12. Segments 1 to 6 so numbered, are connected by a group'of six cabled conductors l to 6 to one terminal of the windingsot each of the selecting magnets 27 of an outgoing record-printing apparatus28, theopposite terminals of the magacommon source of positive potential 29. The segments 7 f-to "12 of ring 24 are similarly Iconnected by a group ot six cabled conductors end of thewindings of: the selecting magnetsliiO of an outgoing record printer 31, the opposite ends of the windings being. grounded at 32. g

As'is usual in multiplex operation, the polarityof the marking and spacing. signals for the A channel are reversedw'ith respect to-the polarity employed for the B channel, and in the embodiment shown, negative potentialis employed for the markingsignals marking signals through channel the tongue otrelay 26 is moved to its left hand contact a to apply positive battery to the solid ring23- and complete the circuit to-r the windings of the selecting. magnets 30 of the B channel printer-to the ground 32; .The relay 26 therefore serves to set up the marking signals on the receiving rings for both Lee channels A and B, irrespecti ve of the polarity employed for the marking signals, so that the selecting mechanism of the A'and B channel printers-28 .and31 will be operated in accordance withthe signal combinationstransmitted over l ne L. I I

No provis on is made in Figures 1A and 1B for obtaining an outgoing record. of the signals transmitted through rings 10. and 11 to Y line L by means of the B. channel transmitter 16",'but it such record, is desired, it may be obtainedbyiusing a third printing appa ratus and setting up the marking and spacing signals uponthe unemployed segments of the receivingring 2a with the addition of another solid ring for distribution to such printing apparatus, orit desircd, a separate distributor operating in synehronism with the transmitting distributor may be em ployed for operating the-printersto provide a, record of the signals transmitted; from rings 10 and 11, asillustrated in Figure 2.

The local and phasing rings comprise a solid ring 35 connected to a source ofpositive potential and a segmented ring 36havembodiment; shown, twenty-four segments. The rings-35 and 361 serve three functions first to. controlthe .Opcration oii the B. and Bfchannel tapetransmittersto set up successive codeco-mbinationsfon the sending rings,-second to operate the printing magnets of the A and B channel printers,

and third to supply phasing signals, if desired, to the-lines L or L to enable the receiving distributors to be adjusted in the proper phase relation-to thetransmitting distrib u tor. Rings and 36 are traversed by "a brush b4; r i; I

For the operation of the tape transmitters,- segments 2, 3 and 4 are joined by 'a conductor 37 to one terminal of the windingo-f the op eratingmagnet 38 of theB channel tape transmitter 16; segments 6, 7 and 8 are connected by. a conductor 39 to one terminal of the windingof the operating'magnet 40 of the .13 channel transmitter 16 ,and segments 14, 15 and 16are connected by a conductor 42 'toone terminal of the winding of the, operatingmagnet 43, oi the A channel trans.

mitter 14. The arrangement of the segments 7 connected to each operating magnet is such,

with respect to the segments of the sending -rings,' that the A channel transmitter 14*,"is

operated to set up a new code combination on segments 1 to 6 ofthe sending rings during the time that signals are being transmitted from the B and-B channel transmitters 16 and 16 and these latter transmitters, are operated, through their magnets 38 and 40-to set up a new code combinatiomduring the timesignals are being transmitted over channel A, from transmitter 14.. It is obvious that magnets 38 and 40 might be connected in series or ,in parallelso as to operate simultaneously from a'singlejset ofsegments, as for instance, segments 2, 3-and 4. I

For the operation of the printinglmagnets' of the Aand B channel printers, segment 5 of ring 36 is joined by a conductor 7 to the operating magnet 44 of the-B channel printer 31, L

and segment :17 of ring 36 is connected by a "conductor 7 'to-the operating magnet'45 of the A channel printer=28. These connections are such that the printing magnet of the A channel printer operates during the time a new combination is being set up by the selecting magnets of the B channel printer and vice versa. I V

For thepurpose of transmitting phasing signalsto the line L,-segment l of ring 36 is connected by a conductor 46 to the sleeve contact a of jack 47, associated with the line L, and segments 23' and 24 are joined by a conductor 48 with contact I; of the jack 47. The sleeve contact 6 of jack 47 also has a source of positive potential 49 connected thereto independently of r the di stributor, through a v resistance R1. The tip spring a of ack 47 is connected to the windings C and D in series of polarized relay 50, and thencet-hrough resistances R2 and R3 to the ground at 51,

and contact (Z of the jack is connected to the windings and B in parallel, of the relay 50,

nals to the line L, a solid pin Pis inserted in 7 Duringthe 'passageof the local brush '64 over.

and thenceto the groundi The marking vand spacing contacts of relay 50 are connected to negative and positive battery respectively, andthe tongue-is joinedtospring 0 of jack 22. 1 WVhen it is 'desireditotrans'mit phasing sigjack 47 so Vast-o provide a metallicconnection between the tip and sleeve'of the jack and to interrupt contact between springs 0 and 'dh segment 1, positive i potential is applied through the sleeveand tip of jack 47 to the windings .C and D of relay 5,0 in such direction as to move the relay tongue-againstits spacing contact andapply spacing battery to 1 1 theline through spring-s '0 and (lot jack 22. Asthe brush 64 passes ofl segment 1, the tongue of relay 50 is held on its spacing contact by positive batteryf'trom the source 49 applied through the resistance R1, thus main- 19;; tainingspacing battery on theline duringthe passage of thelocal brush over segments 2 V to and thereby leavingthese segments free s "for performing other functions; Upon engagement of the brush-with segments 23 and 24, positive battery is applied through springs b and d to the windings Aland B of the relay 50 in'a-markingdirect-ion and of such magni tude as to overcome the spacing bias of windings C and D, thus moving-the relay tongue to-its marking contact to transmit a marking signal over the line; 1 i I i s Thus for each revolution ofthe distributor brush 64, a single 'marking sig'nal is applied to'the line, which may be utilized at the r'eceiving station in' adjusting the receiving dis tributor to the correct phase 'rel'ationto the transmitting distributor. It should be noted that the phasing signals may be transmitted over line L1Without' interru'pting' the transmission of intelligence signals over the line 55 to contact 0; of'jacks47 and 47 respec I ma If it is desired to transmit-AC signals or current reversals to line L forinstancepfor use in balancing the artificial line AL'fwith the real line, the pin isremoved from both jacks 47 and22to leave these jacksfin the'condition shown'in Figure'lB. A circuit is thus completed from thelring'53 through conductor 55,i sprin'gs c and d of jack 47 and windings A and B of relay 50thus causing the :relay tongueto oscillate between its marking and spacing Contacts as thabrush p asses over the balancingrings. Current :reversals are thus transmitted from the relay tongue through the-contacts cand cl of jack'22 to the duplex nels' B and B, and that if desired,eeither phasing or balancing signals may be trans- 'mitted, over either line without interfering With-the transmission of; intelligence signals over the remainlng lines. Furthermore, balancing; signals may be transmitted over one lineand phasingsignals over the other.

The-distributor is operated by means of a phonic motor, the field windings ofwhich are illustrated at v5 5, controlled through a driving fork 56in the usual manner.

v It is obvious, of course, that the segmented rings 11 and 11 may be so divided that three, four or more channels may-be usedwith this system. Moreover additional relays may be multiplied to the solid s ending r ngs for transmission from each set 1 of rings into a group of lines, over any one of which intelligence signals, phasing-signals or balancmg signals may be transmitted. By adding additional sets, of sending rings to the-distributor connect'ed to the transmitter 14, 16.or 16 or to additional ;transmitters, still further lines or'groups oflines may. be controlled from .the single distributor with different transmitting assignments as, for instance, the same A' channel transmission withstill clifferent B channel transmission or with either B or B7, channel transmission and diiferent'A channel transmission.

The method and apparatusfor taking an outgoing printed record of the multiplex sig: nals is described more specifically in our copending; application, Serial No. 446,631, filed April 23, 1930,,and entitled,Means for taking an outgoingprinted record. Theapparatus for selectively;transmitting either phasing signals or intelligence signals over a number of-lines of a multiplexsystem is covered specifically in our copending application, Serial No.'l4r8,3,69, filed April 29, 11930, andent-itled ,FMeans of phasingh'f The selective transmission of balancing signals and intelligence signals, over a number of lines, is covered specifically in our copendingapplication, Serial No.44i6,630,' filed April 23, 1930, and entitled,Means for sending alternating current toa multiplexline; j v

In Figu're'2 we have shown an arrangement for. obtaining aprinted record of the outgoing signals by means of a separate distributor oper'atin g jin synchronism Wltllyhhfi transmits ting distributor,- The transmitting dlStIlbll- 'ductor 78. 7

ling-a pair oftape transmitters 63 and 64 through operating magnets 65 and 66 respectively, to set up Slgl'ltllCOIllbll'lBilOllS on the sending ring 60 for each channel; The transmitting distributor "is: operated through a phonic motor, diagrammatically illustrated at 67, controlled through a driving fork 68.

The solid sending ring 59 ofthe distribur tor is connected to the outgoing line.69 in the usual manner and also to the windings ofa polarized relay 70for repeating the signals to the distributorcontrolling the outgoing record printed. This latter distributor comarises the receiving rings 71 and 72, the-former bein connected electrically to the tongue ofrelay 70 and the latter being segmented and having connections to the selecting mag nets 73 and 74 respectively, of theA and B channel printers. A pairof rings 77 and 7 8 is also provided for the outgoing record distributor, ring 7 8 being segmented and having segments 9 and 17 connected to'the operat ing magnets 75 and 76-of the B and A-chain nel printers respectively; The outgoing; recs 0rd distributoris operated by a phonic wheel 7 9,. also controlled from the driving fork 68 so as to operate in synchronism, with the transmitting distributor. I y j The separate outgoingirecord distributor maybdemployed for obtaining a printed record of thesignals transmitted from rings 10 and 11 over line L. of the embodiment shown in Figures 1A and 113,, by connectingthe relayTO to the-solidring 10, as by the con It: is obvious, of course, that numerous changes may be madein the detailsgof the system without departing from the invention, and therefore, we desire to include all such changes and modifications as come within the scopeof theappended-claims;

What is claimed is:,

1. In a'multiplextelegraph system, distributor having a plurality of sets of sending. rings aranged for multi-channel transmis sion, one ormore line circuits associated with each set of rings, a single transmitterwjommon to each set of rings forgcontrolling-one channel of communication andan individual transmitter for eachset of ringsv for controlling another channel of communication.'

2. In a multiplex telegraph system, a plurality of linecircuits, a transmitter common to eachof said circuitsfor controllingone channel of communication thereover and a separate transmitter for each of said circuits or groups of circuits for controlling another channel of communicationthereover. i

3. In a multiplex telegraph system, aplus rality of line circuits, a transmitter common to two or-more of saidicircuits for controlling Ill! one channel of communication over each cir- 5. In a multiplex "telegraph system, a

transmitter common to a plurality of line circuits for controlling one channel of'communication over each of said lines, a transmitter individual to a part only of said line circuits for controlling another channel of communication thereover, one or more additional trans- Without interrupting the transmission of intelligence signals over the remaining lines.

In testimony whereof We aflix our signatures.

RAY HOO VER -ROBERT F. "DIRKES.

mitters for controlling said last channel of 7 communication over the remaining lines, and

a single distributor associated with said transm tters for all of said l1nes.

'6. In a multiplex telegraph transmitting system, a plurality of lines and means including a plurality of transmitters and asingle rotary distributor for transmitting identical information to all of said lines over one channel and separate information to each of the lines over another channel.

7. In a multiplex telegraph transmitting 'system,a plurality of lines, means for transmitting identical information to all of said lines overone channel comprising a single transmitter and means for transmitting separate information to each line over another channel.

c 8. In a multiplex telegraph system, a rotary distributor having a plurality of sets of V sending rings, one or morelines associated with each set of ringsyand means associated with sa d distributor for transmittingidentia plurality of line circuits, means comprising each of said lines or cal informatonto all of said lines over certain channels anddiiierent information to groups of lines over other channels. 7

9. In a multiplexprinting telegraph system a single transmitter for controlling the transmission to two or moresald line clrcuitslover one channel, means comprising indivldual transmitters for effecting separate transmission to each of saidline circuits over another channel and means for obtaining an outgoing printed record of the signals transmitted by one .or more of said transmitters. Y

10. In a multiplex printing telegraph system, a plurality of line circuits, a rotary distributor, said distributor having facilities for transmitting identical intelllgence signalsto "two or more said lines over one channel and separate intelligence signals to said lines over another channel or fortransmitting' non-intelligence signals to one or more of said lines 

